Statistical Approach to Quantum Field Theory
Subtitle: An Introduction
By: by Andreas Wipf
Contributors: SpringerLink (Online service)
Series: Lecture Notes in Physics -- 864
Publisher: Springer Berlin Heidelberg; Imprint: Springer
Published: 2013
Place of publication: Berlin, Heidelberg
Language: eng
Format: [electronic resource] :
Number of pages: 390
ISBN-13: 9783642331053
Subjects: Numerical and Computational Physics; Dynamical Systems and Complexity Statistical Physics; Quantum theory; Mathematical physics; String Theory Quantum Field Theories; Quantum Field Theory Elementary Particles; Physics; Mathematical Methods in Physics
Description: <p>Over the past few decades the powerful methods of statistical physics and Euclidean quantum field theory have moved closer together, with common tools based on the use of path integrals. The interpretation of Euclidean field theories as particular systems of statistical physics has opened up new avenues for understanding strongly coupled quantum systems or quantum field theories at zero or finite temperatures. </p><p><br>Accordingly, the first chapters of this book contain a self-contained introduction to path integrals in Euclidean quantum mechanics and statistical mechanics. The resulting high-dimensional integrals can be estimated with the help of Monte Carlo simulations based on Markov processes.^

The most commonly used algorithms are presented in detail so as to prepare the reader for the use of high-performance computers as an “experimental” tool for this burgeoning field of theoretical physics.</p><p><br>Several chapters are then devoted to an introduction to simple lattice field theories and a variety of spin systems with discrete and continuous spins, where the ubiquitous Ising model serves as an ideal guide for introducing the fascinating area of phase transitions. As an alternative to the lattice formulation of quantum field theories, variants of the flexible renormalization group methods are discussed in detail.^

Since, according to our present-day knowledge, all fundamental interactions in nature are described by gauge theories, the remaining chapters of the book deal with gauge theories without and with matter.</p><p><br />This text is based on course-tested notes for graduate students and, as such, its style is essentially pedagogical, requiring only some basics of mathematics, statistical physics, and quantum field theory. Yet it also contains some more sophisticated concepts which may be useful to researchers in the field. Each chapter ends with a number of problems – guiding the reader to a deeper understanding of some of the material presented in the main text – and, in most cases, also features some listings of short, useful computer programs.</p>
Table of contents: title: <p>Introduction; title: Path Integrals in Quantum and Statistical Mechanics; title: High-Dimensional Integrals; title: Monte-Carlo Simulations in Quantum Mechanics; title: Scalar Fields at Zero and Finite Temperature; title: Classical Spin Models: An Introduction; title: Mean Field Approximation; title: Transfer Matrices, Correlation Inequalities and Roots of Partition Functions; title: High-Temperature and Low-Temperature Expansions; title: Peierls Argument and Duality Transformations; title: Renormalization Group on the Lattice; title: Functional Renormalization Group; title: Lattice Gauge Theories; title: Two-dimensional Lattice Gauge Theories and Group Integrals; title: Fermions on a Lattice; title: Index.</p>.